ZIP Code 91902
High RiskPFAS above EPA limits detected
2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
11
PFAS Detected
2
Above EPA Limits
3
Water Systems
285%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 285% of limit
Detected: 11.40 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 143% of limit
Detected: 5.70 ppt
SAN DIEGO, CITY OF
CA3710020 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 65000.00ppt | No federal limit | — | Unregulated |
SWEETWATER AUTHORITY
CA3710025 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
2
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 11.40ppt | 285% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 5.70ppt | 143% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 9.40ppt | 94% of limit
| 10 ppt | Below limit |
lithium | 28000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 12.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 11.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 7.60ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 4.70 ppt | No federal limit |
OTAY WATER DISTRICT
CA3710034 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 28900.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 91902 is served by 3 separate water utilities.
Results above show data for each system independently.
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.